基于Springboot+vue实现前后端分离二手图书交易

Posted 2022-08-03 编程指南针

作者主页：编程指南针

作者简介：Java领域优质创作者、CSDN博客专家 、掘金特邀作者、多年架构师设计经验、腾讯课堂常驻讲师

主要内容：Java项目、毕业设计、简历模板、学习资料、面试题库、技术互助

文末获取源码 

项目编号：KS-029

一，项目简介

  本项目基于Springboot+vue实现的前后端分离的二手图书交易系统，实现的功能较为简单。用户登陆系统后可以进行图书的发布和浏览，并可以进行全文检索，别的用户可以查看详情联系发布人进行线下交易。

二，环境介绍

语言环境：Java:  jdk1.8

数据库：mysql: mysql5.7

应用服务器：Tomcat:  tomcat8.5.31

开发工具：IDEA或eclipse

三，系统展示

用户登陆

首页展示

图书列表

图书详情

个人中心：可以发布图书和管理己发布的图片

添加图书

修改密码

四，核心代码展示

package com.znz.backend.wj.contorller;

import com.znz.backend.result.Result;
import com.znz.backend.wj.Service.BookService;
import com.znz.backend.wj.bean.Book;
import net.coobird.thumbnailator.Thumbnails;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;
import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.Map;
import java.util.Random;

/**
 * @author znz
 * @create 2020/02/07/10:52
 */
@RestController
public class LibraryController 
    @Resource(name="bookService")
    private BookService bookService;
    @Value("$fileupload.path")
    private String path;
    //返回所有的图书
    @CrossOrigin
    @GetMapping("api/books")
    public List<Book>findAll() throws Exception
        return bookService.findAll();
    

    //根据用户账号返回所有的书
    @CrossOrigin
    @PostMapping("api/booksByUid")
    public List<Book>findAllByUid(@RequestBody Book book)
        return bookService.findAllByUid(book.getUid());
    

    //根据种类查询图书
    @CrossOrigin
    @GetMapping("api/categories/cid/books")
    public List<Book> listByCategory(@PathVariable("cid") String cid) throws Exception 
        if (!cid.equals("0")) 
            return bookService.findAllByCategory(cid);
         else 
           return findAll();
        
    
    //根据种类和用户名查询用户添加的图书
    @CrossOrigin
    @PostMapping("api/categories/uid/UserBooks")
    public List<Book> listByCategoryAndUid(@RequestBody Book book)
        System.out.println(book);
        if (!book.getCid().equals("0")) 
            return bookService.findAllByCategoryAndUid(book.getCid(),book.getUid());
         else 
            return bookService.findAllByUid(book.getUid());
        
    


    //根据id删除图书
    @CrossOrigin
    @PostMapping("api/delete")
    public Result deleteBookById(@RequestBody Book book)
        int num=bookService.deleteBookById(book.getId());
        if(num==0)
            return new Result(400);
         else 
            return new Result(200);
        
    

    //根据id和用户编号删除图书，并删除本地服务器存储的图片
    @PostMapping("api/deleteById")
    @CrossOrigin
    public Result deleteBookByIdAndUid(@RequestBody Book book)
        int num=bookService.deleteBookByIdAndUid(book);
        if(num==0)
            return new Result(400);
         else 
            if(!book.getCover().equals(""))
                String cover=book.getCover().split("/api/file/")[1];
                deleteImg(cover);
            
            if(!book.getImg_1().equals(""))
                String img_1=book.getImg_1().split("/api/file/")[1];
                deleteImg(img_1);
            
            if(!book.getImg_2().equals(""))
                String img_2=book.getImg_2().split("/api/file/")[1];
                deleteImg(img_2);
            
            if(!book.getImg_3().equals(""))
                String img_3=book.getImg_3().split("/api/file/")[1];
                deleteImg(img_3);
            
            if(!book.getImg_4().equals(""))
                String img_4=book.getImg_4().split("/api/file/")[1];
                deleteImg(img_4);
            
            if(!book.getImg_5().equals(""))
                String img_5=book.getImg_5().split("/api/file/")[1];
                deleteImg(img_5);
            
            return new Result(200);
        
    
    @CrossOrigin
    public void deleteImg(String imgName)
        String imgUrl="/home/Youth-imgs/"+imgName;
        File img=new File(imgUrl);
        img.delete();
    
    //添加一本图书
    @CrossOrigin
    @PostMapping("api/insert")
    public Result insertBook(@RequestBody Book book)
        System.out.println(book);
        if(bookService.insertBook(book)==0)
            return new Result(400);
         else 
            return new Result(200);
        
    
    //根据书名查找图书
    //使用form表单传递数据
    @CrossOrigin
    @PostMapping("api/search")
    public List<Book> searchBooksByTitle(@RequestParam Map<String,Object> keywords, HttpSession session)
        return bookService.finAllByTitle((String)keywords.get("keywords"));
    

    //上传图片
    @CrossOrigin
    @PostMapping("api/uploadImg")
    public String coversUpload(MultipartFile file) throws Exception 
        //查看图片类型
        String type=file.getContentType().split("/")[1];
        if(type==null||file.getSize()>1048576)
            return null;
        
        String folder = path;
        File imageFolder = new File(folder);
        File f = new File(imageFolder, getRandomString(10) + file.getOriginalFilename()
                .substring(file.getOriginalFilename().length() - 4));
        if (!f.getParentFile().exists())
            //如果不存在文件则创建文件夹
            f.getParentFile().mkdirs();
        try 
            //存入图片
            file.transferTo(f);
            //对存入的图片进行压缩,并转换为jpeg格式
            Thumbnails.of(f)
                    .outputFormat("jpg")
                    .scale(0.5f)//图片比例压缩
                    .outputQuality(0.5f)//图片清晰度压缩
                    .toFile(f.getPath().split("\\\\.")[0]+".jpg");
            if(!type.equals("jpeg"))
                //删除图片
                f.delete();
            
            String imgURL = "http://localhost:8443/api/file/" + f.getName().split("\\\\.")[0]+".jpg";
            return imgURL;
         catch (IOException e) 
            e.printStackTrace();
            return "";
        
    
    //删除图片
    @CrossOrigin
    @PostMapping("api/deleteImg")
    public void deleteImg(@RequestParam Map<String,Object> requestMap)
        String imgName=requestMap.get("imgUrl").toString().split("/api/file/")[1];
        deleteImg(imgName);
    

    //生成length个随机数组成的字符串
    public String getRandomString(int length) 
        String base = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        Random random = new Random();
        StringBuffer sb = new StringBuffer();
        for (int i = 0; i < length; i++) 
            int number = random.nextInt(base.length());
            sb.append(base.charAt(number));
        
        return sb.toString();
    

package com.znz.backend.wj.contorller;

/**
 * @author znz
 * @create 2020/01/27/16:00
 */

import com.znz.backend.result.Result;
import com.znz.backend.wj.Service.UserService;
import com.znz.backend.wj.bean.User;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;


import javax.annotation.Resource;
import java.util.Map;

@Controller
public class UserController 
    //Mybatis操作数据库
    @Resource(name = "userService")
    private UserService userService;

    //登录账号
    //注解@CrossOrigin解决跨域问题
    //@CrossOrigin
    @CrossOrigin
    @PostMapping(value = "api/login")
    @ResponseBody
    public String login(@RequestBody User requestUser) 
        return userService.login(requestUser);
    

    //注册账号
//    @PostMapping(value="api/register")
//    @ResponseBody
//    public Boolean register(@RequestBody User requestUser)
//        return userService.register(requestUser);
//    

    //修改密码
    @PostMapping(value = "api/changePassword")
    @ResponseBody
    public Result ChangePassword(@RequestParam Map<String, Object> requestMap) 
        return userService.changePassword(requestMap);
    

    //查找账户是否存在
    @PostMapping(value = "api/selectUser")
    @ResponseBody
    public Boolean selectUser(@RequestParam Map<String, Object> requestMap) 
        return userService.selectUser(requestMap);
    

package com.znz.backend.wj.dao;

import com.znz.backend.wj.bean.Book;
import com.znz.backend.wj.bean.Category;
import org.apache.ibatis.annotations.*;
import org.apache.ibatis.mapping.FetchType;
import org.springframework.stereotype.Repository;

import java.util.List;

/**
 * @author znz
 * @create 2020/02/06/23:21
 */
@Mapper
@Repository(value = "bookMapper")
public interface BookMapper 

    //根据书的种类找到这一类型的所有书
    @Select("select * from book\\n" +
            "where book.cid=#_parameter")
    List<Book> findAllByCategory(String cid);

    根据书的种类和用户账户找到这一类型的所有书
    @Select("Select * from book where book.cid=#param1 and book.uid=#param2")
    List<Book>findAllByCategoryAndUid(String cid,String uid);


    //根据书名模糊找到书
    @Select("select * from book\\n" +
            "where book.title like '%$_parameter%'")
    List<Book> findAllByTitle(String title);


    //找到所有的书
    @Select("select * from book")
    List<Book> findAllBooks();

    //根据用户账号返回所有的书
    @Select("Select * from book where uid=#_parameter")
    List<Book> findAllBooksByUid(String uid);

    //根据id删除书籍
    @Delete("delete  from book where id=#id")
    int deleteBookById(int id);

    //添加图书
    @Insert("insert into znz.book(cover,title,author,date,price,newOld,contact,phone,qq,weChat,img_1,img_2,img_3,img_4,img_5,abs,cid,uid)\\n" +
            "values(#param1,#param2,#param3,#param4,#param5,#param6,#param7,#param8,#param9,#param10,#param11,#param12,#param13,#param14, #param15,#param16,#param17,#param18)")
    int insertBook(String cover,String title,String author,String date,String price,String newOld,String contact,String phone,
                   String qq,String weChat,String img_1,String img_2,String img_3,String img_4,String img_5,String abs,
                   String cid,String uid);

    //根据用户账号和书的id删除书籍
    @Delete("delete  from book where id=#param1 and uid=#param2")
    int deleteBookByIdAndUid(int id,String uid);

package com.znz.backend.wj.Service;

import com.znz.backend.wj.bean.Book;
import com.znz.backend.wj.bean.Category;
import com.znz.backend.wj.dao.BookMapper;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;

/**
 * @author znz
 * @create 2020/02/07/10:38
 */

@Service(value = "bookService")
public class BookService 
    @Resource(name = "bookMapper")
    private BookMapper bookMapper;
    @Resource(name = "categoryService")
    private CategoryService categoryService;

    /*******查询******/
    //返回所有的图书
    public List<Book> findAll() 
        return bookMapper.findAllBooks();
    

    //根据用户账号返回所有的书
    public List<Book> findAllByUid(String uid) 
        return bookMapper.findAllBooksByUid(uid);
    

    //根据书的种类返回所有的书
    public List<Book> findAllByCategory(String cid) 
        return bookMapper.findAllByCategory(cid);
    
    //根据书的种类和用户账户返回所有的书
    public List<Book> findAllByCategoryAndUid(String cid,String uid)
        return bookMapper.findAllByCategoryAndUid(cid,uid);
    

    //根据书名找到所有的数据
    public List<Book> finAllByTitle(String title) 
        return bookMapper.findAllByTitle(title);
    

    //根据id删除图书
    public int deleteBookById(int id) 
        return bookMapper.deleteBookById(id);
    

    //添加一本书
    public int insertBook(Book book) 
        return bookMapper.insertBook(book.getCover(), book.getTitle(), book.getAuthor(), book.getDate(), book.getPrice(), book.getNewOld(), book.getContact()
                , book.getPhone(), book.getQq(), book.getWeChat(), book.getImg_1(), book.getImg_2(), book.getImg_3(), book.getImg_4(), book.getImg_5(), book.getAbs(), book.getCid(), book.getUid());
    

    //根据用户账号和书的id删除书籍
    public int deleteBookByIdAndUid(Book book) 
        return bookMapper.deleteBookByIdAndUid(book.getId(), book.getUid());
    

五，项目总结

   本项目结构简单，代码简洁，比较适合做课程设计或期未作业使用，也可以在这个基础上进行功能扩展和增加，实现一个比较完整的毕业设计系统